package com.lang;

import org.junit.Test;

/**
 * @Description
 * @Author away
 * @Version V1.0.0
 * @Since 1.0
 * @Date 2019/3/28
 */
public class LongDemo {
    @Test
    public void test(){
        Long a = null;

        System.out.println(Long.toString(a));
    }
}
